Electric transformer



Sept. 14 1926.

H. S. HOLBROOK ELECTRI C TRANSFORMER Filed March 30, 1926 Fig.3.

Inventor: Henvg S.Ho|br-ooK,- 8 W 4 2. His Atmorne Patented Sept. 14, 192

UNI-TED STATES PATENT oFFIcE;

Emmi?- sunny" nommoox, or RUGBY, mamas, Assmnon 'ro om ELECTRIC 1 com-rm, a CORPORATION. or NEW YORK,

ELECTRIC raansr onmsn Application ma am]. so, 1926., Serial No. 98,579, ot norm Britain July-71 1825.

My invention relates to, electric trans formers and more particularly to spacing members adapted to' be inserted between 1 edges. The general object of the present invention is to provide'a transformer disk coil spacerhaving transverse ducts arranged to allow an. insulating fluid to come in contact with the surfaces of the coils separated by the spacer, the portion of the spacer in contact with the coil surfaces, however, having unbroken edges so that the span of the unsupported portion of a coilbetween spacers is reduced and greater support is provided for, the coils against the mechanical stresses of a'shortcircuit:

The invention will be better understood from the following description, takeninconnection with the accompanying drawing,- in which Fig. -1 is a sectional plan view of a transformer having coil spacing members constructed in accordance with the invention'; Fig. 2 is an exploded view in perspective of one of the spacingfmembers shown in Fig.1; Fig. 3is a plan view ofa spacing member with its parts assembled, and Fig. 4 is a section on the line 4--4 of Fig. 3w;

The particular form of spacing memberillustrated in the drawing is made npof a 4 number of layers of suitable insulating material. In the example. shown, the spacer consists of four layers, the outer two layers 10 and 11 havin anumber of openings 12 edges are unbroken and the-intermediate or insidelayer's I 13 and 14 having notches 15 extending inward-1y from both side'edges. Each of the layers comprising the spacer may have a notch 16 its-end to engage a locking strip so that the spacers may be between their si e edges sothat these side myhand this tenth dfiy held in aim-war: assembled gum-11s,.

former. In'thebIedspacer, the o en ings-l2 and the notches .15ove'rlap-to orm transverse passageways so that oil or other insulating fluid may. enter-the. notches 15 at one side of the "inside layers 13 and 14,

thence pass throug-h fthe'v openings 12 in the outside layers 10 and li and in. contact with the coils .whichare separx'ttedby the spacer and then out through the notches 15 "in the other side of-tlfie inside layers 13 and 14.

'As'shownin Fig. 1 the "sp c m y arranged radially with respect to thetran's-f former coils" and at approximately right h angleswitlithe coil conductors. As the s de; edges of the outer-layers 10and;1-1 have.no

notches and are; unbroken by the passage;

ways, the unsupported span of coil is no- Where greater than the distance between the'adjacent edges of adjacent spacers. j

- In the spacer which-has been shown and described, the transversepassageways-are at sageways is not limited to this "angle? by Letters Patent or the Unitedstates, is,

1 right angles to the sides ofthe'spacer, but

it is obvious that the direction of the pas; v '75 What I claim as new and desire "to secure 1. A transformer .coil spacemcomprising outer layers having openings between their 1 i side edges, and 'innerlayers having-their edges provided with notches, saidW'penings' and notches overlapping and communieating to form transverse passageways for" insulating fluid, whereby the side edges of 'saidouter layers are unbmkeriJ yfSaidTPassageways.

2. A transformer :coil spacer comprising a layer .having'a notch in each'side edge,

and a layer having an .-opening between its side edges, said notches andi opening over: lapping and communicating to form a transverse passageway for insulating fluid, and the la' er with said opening forming an outer. aceadaptcd to supporta transformer coil, whereby the edges of'said' coil contacting face areunbroken by said passages l h witness whereof, I have hereuntOset of March,.I,926. S.. HOLBRQOKi 

